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Browse free open source C++ Algorithms and projects below. Use the toggles on the left to filter open source C++ Algorithms by OS, license, language, programming language, and project status.

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  • 1
    FileVerifier++
    FileVerifier++ is a Windows utility for calculating hashes using a number of algorithms including CRC32, MD5, SHA-1, SHA-256/224/384/512, WHIRLPOOL, and RIPEMD-128/160/256/320. Supported hash file formats include MD5SUM .MD5, SFV, BSD CKSUM, and others.
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    Downloads: 81 This Week
    Last Update:
    See Project
  • 2
    A slightly reduced strength bulk encryption. In exchange for the reduced strength, you get the ability to rsync the encrypted files, so that local changes in the plaintext file will result in (relatively) local changes to the cyphertext file.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 3
    PetoronHash-System

    PetoronHash-System

    PHASH | post-quantum XOF hashing algorithm | C++20

    PHASH is a self-contained, dependency-free, post-quantum XOF hashing algorithm implemented in modern C++20. This release delivers the first fully stable production implementation of the PetoronHash-System — a 1600-bit sponge-based hash function with domain separation, extendable output, and deterministic behavior. Key Features No external dependencies — pure C++20 implementation. Extendable Output (XOF) — supports arbitrary output length (256–8192+ bits). Post-quantum oriented design — ARX-based sponge resistant to Grover-type attacks. Context and salt separation — unique hashing domains for each use-case. Optimized performance — ~120–130 MB/s Comprehensive verification — verify_all.sh performs KAT tests, determinism checks, and performance validation. Verification Script: chmod +x verify_all.sh ./verify_all.sh https://github.com/01alekseev/PetoronHash-System Ivan Alekseev | petoron.org
    Downloads: 3 This Week
    Last Update:
    See Project
  • 4
    Command line encryption tool for one time, daemon, or stream data processing. Data stats, check sums, conversion to/from text. Data/keys from files, pipes, standard input. In-place/diverted processing or data-analysis-only. Random, file, password keys.
    Downloads: 3 This Week
    Last Update:
    See Project
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    The All-in-One Commerce Platform for Businesses - Shopify

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  • 5
    XOR encrypt v2.0

    XOR encrypt v2.0

    Encrypt Your Text documents with XOR encryption

    This software provides an easy graphical way to encrypt your text documents from source code , text files ,scripts even jpeg files .It is a enhanced version of my earlier project https://sourceforge.net/p/xorencrypt which used win32 GUI . This is a demonstration of working of XOR encryption which was used by Germans in World War II (http://en.wikipedia.org/wiki/Lorenz_cipher) . Besides from XOR'ing the message with password after every encryption the key changes pseudorandomly. The password you provide is hashed ( SHA256 ) and saved into the encrypted file to check if the password provided is correct.This algorithm has limitations in general more the numbers of relative characters in the password to plaintext more secure will be the encryption. XOR encrypt has a 3.5 of 5 editors rating from softpedia http://www.softpedia.com/get/Security/Encrypting/XOR-Encrypt.shtml
    Downloads: 2 This Week
    Last Update:
    See Project
  • 6

    Cryptography Tools

    Classic & Modern Cryptography tools

    Cryptography Tools is a project to develop demonstration tools on classic (currently Caesar and Playfair) & modern crypto-systems, including private & public key encryptions, digital signatures, cryptographic hashes and authenticated encryption.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7

    ExRandom

    Sampling exactly from the normal and exponential distributions

    ExRandom is a small header-only C++11 library for exact sampling from the normal, exponential, and discrete normal distributions (provided that the underlying generator is perfect). This library provides an implementation of the algorithms described in C. F. F. Karney, Sampling exactly from the normal distribution, ACM Trans. Math. Software 42(1), 3:1-14 (Jan. 2016), https://doi.org/10.1145/2710016, https://arxiv.org/abs/1303.6257.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    (Production / Stable) Command line tool to compute the 64 bit CRC of one or more files.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    User AES-128 bit encryption in counter mode of operation. supports interactive mode of operation and command line mode of operation.
    Downloads: 1 This Week
    Last Update:
    See Project
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  • 10
    It moves by itself inside networks like virus infection & plagues, it is being written to solve computer virus problem drastically and responsibly. It is legal, free and open for public domain to improve W3 ICT Security.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Open Uniper

    Open Uniper

    Open Uniper is the XTRAP's reversed encryption algorithm.

    Open Uniper is a project created by d3v1l401 (http://d3vsite.org) and targets to make the encryption algorithm of XTRAP open source. Currently NOT Optimized view of code,NOT Optimized code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Pambaf

    Pambaf

    Another encryption algorithm

    Pambaf is a new encryption algorithm for users or developers with extremely high demands for security.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    The PowerCiph Data Encryption Algorithm is a versatile, yet simplistic, encryption algorithm/protocol. The ultimate goal of the algorithm is simplicity, compactness, and a lack of prerequisites.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    A Collaborative Attack on Complexity to Create a New Global Way of Life
    Downloads: 0 This Week
    Last Update:
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